Planetary Annihilation is a good game, but it has its pros and cons. Among the minuses, I will note a weak company, not supported by any plot at all. You just stupidly travel through systems and take out the enemy from different planets. I can’t say anything about multiplayer... I launched it once and they took me out in about 5 minutes! After that I gave up and didn’t start it again.
The main feature of this game is the idea! A strategy for planets with the ability to destroy these planets is a really cool idea. The game costs pennies, so for its price, the game is great.